place = ['Nanchang', 'Beijing', 'Chongqing', 'Shanghai', 'Shenzhen']
print(place)
sorted(place)
print(place)
sorted_place = sorted(place)
sorted_place.reverse()
print(sorted_place)
print(place)
place.reverse()
print(place)
place.reverse()
print(place)
place.sort()
print(place)
place.reverse()
print(place)
# 练习3.8
...
# 练习3.10
